<!DOCTYPEHTML>
<html>
<head>
<meta charset="utf-8">
<title>formaction特性</title>
</head>
<body>
<form id="form1" method="post" action="?">
  <input name="name" type="text" form="form1" />
  <input type="submit" value="提交到Page1" formaction="?page=1" />
  <input type="submit" value="提交到Page2" formaction="?page=2" />
  <input type="submit" value="提交到Page3" formaction="?page=3" />
  <input type="submit" value="提交" />
</form>
</body>
</html>
